Publisher: National Geospatial-Intelligence Agency (NGA)
This vector-based collection of GIS data has a horizontal accuracy of 125-500m and vertical accuracy of 0.5-2m. Thematic layers include major road, railroad and utility networks; hydrological; major airports; elevation contours; coastline; international boundaries; populated places; and geographical names. The horizontal datum conforms to the World Geodetic System 1984 (WGS 84) and the vertical datum is Mean Sea Level.The original data structure is Vector Product Format (VPF) . It could be converted to ESRI Shape, MapInfo, ArcInfo,DGN, DWG and DXF.
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